Motive-power generator.



No. 647,999. v Patented Apr. 24'; |900. A. THIEBLE &. A. DUMEZ.

MUTIVE PUWER GENERATOR.

(Ap'plicatinn mea 1:80.23, 189s.)

(No Model.)

k I l ../lllllflxlduunn UNITED STATES PATENT GEEIICE.

ALFRED THIEBLE AND ALEXANDRE DUMEZ, OF ',P-ARIS, FRANCE.

lvlo'rlvE-POWER GENERATOR.

SPECIFICATION forming part of Letters Patent No. 647,999, dated April 24, 1900. Application iiled December 23, 1898. Serial No. 700,150. (No model.)

and discharge of combustion-gases to take p YTo all whom, it may concern.-

Be it known that we, ALFRED THIEBLE and ALEXANDRE DUMEZ, citizensof the Republic of France, residing at Paris, France, have invented certain new anduseful Improvements in Apparatus for the Generation of Motive Power, (for which we have obtained Letters Patent in France under `No. 278,256, dated May 24, 1898,) of which the following is a full, clear, and exact description.

This invention relates to apparatus for the generation of motive power, and is characterized by the use of a kind of water-bath enabling two suitable fluids tobe used, one subject to atmospheric pressure and the other contained in a closed air-tight strong reservoir. The result of this arrangement is that as soon as the rst uid is submitted to the action of a source of heat, thereby raising its temperature, the maximum of which is the boiling-point, said -first fluid communicates this temperature to the second, and consequently communicates to it a certain pressure, also having a maximum limit. This maximum is practically constant, as the boiling-point of the first fluid varies only according to its purity and the atmospheric pressure.

The invention is illustrated, by way of example, in the accompanying drawings, in which- Figure 1 is a longitudinal section', and Fig. 2 a front elevation. Fig. 3 is a rear elevation of a generator constructed in accordance with this invention.

The generator chiefly comprises an inner closed air tight and strong reservoir R, through which may pass tubes, or which itself may be multitubular, destined to contain the motive or driving product or medium. The reservoir R is -provided with a gage N andan opening P for taking off steam and another closable orifice A for the charging of the driving medium and its reintroduction after it has been condensed, after being used once, by cooling or by pressure, if required, for condensing it. It follows, therefore, that said driving medium works in a continuous cycle. A double system of tubes T T surround the reservoir R and are destined to transmit heat from the furnace or heater F. These tubes present a considerable heating-surface and terminate in a smoke-box B to enable a draft place through the chimney C. An outer reservoir M surrounds the tubes and is provided with a pressure-gage n, thermometer l?, and drain cock r and contains the iiuid to be heated at the atmospheric pressure and is surrnvountedA by a cylindrical part in which the level'of the liquid must be always maintained, an' upper reservoir D containing the same fluidas the reservoir M and comprising a coil S, in which the steam or vapor from the reservoir M is condensed after4 it has heated the steam-jacket of the driving-cylinder D', the condensed product returning to the reservoir M through the tube t. In case the condensation should be incomplete, which would lead to a slight loss of the fluid, an automatic feed with constant level is effected by means of a oat establishing communication when the level sinks between the orifices o o, whereby the iiuid can flow into the reservoir M through the openings e. Finally a heater or furnace F, designed to burn any suitable fuel.

In order to make the invention more clearly understood, two examples will be given.

In the first example, which we will call a general one, owing to the nature of the products used, we use liquid sulfurous acid as the driving medium, the other fluid being methyl alcohol. Liquid sulfurous acid has at the boiling temperature of methyl alcohol (66.78 at a pressure of seven hundred and sixty millimeters) apressure or tension of vapors of about thirteen atmospheres. As the tension of sulfurous acid at 18 is three atmospheres, the useful effect in employing a water circulation at this temperature will be ten atmospheres. The'case is especially suitable for cold countries.

The second example is more suitable for temperate regions. The driving mediumv is ethyl chlorid and the other medium is Water. Chlorid of ethyl at 100o (the boiling-point of .pure water at seven hundred and sixty millimeters) has a pressure o f 11.48 atmospheres. Presuming that the condensation of the driving medium takes place at 25, which corresponds to a tension of 1.45 atmospheres, the useful effect would be more than ten atmospheres.

Without going into calculation we simplyA suggest for the sake of comparison with an ordinary steam-generator that the total heat required for vaporizing ethyl chlorid at 100 and water at 181 (corresponding to ten atmospheres pressure) should be compared and also the latent heat in each case and the quantities of driving medium to be evaporated, and it Will be seen that the economy of fuel with a generator according to this invention is .eighty'per cent. and the volume thirty times less.

The new generator offers, therefore, in this case the following advantages: a generator one-thirtieth the size of a steam-boiler of the same power; a saving of more than eighty per cent. of fuel; the fluids employed being used in small quantities pressure can be got up very quickly and economically; the driving-cylinder being maintained at the same temperature as the whole system there is no condensation and consequently an absence of shocks due to the pressure of Water; a considerable reduction of temperature in the furnace-room, and less necessity for supervision, the maximum pressure being known beforehand.

We claiml. A motive-power generator comprising a centrally-arran ged closed receiver adapted to contain a liuid as described, tubes arranged around said receiver and adapted to be heated, means whereby the vapor of the fluid in the central receiver may be conducted therefrom for use and be reintroduced into the receiver when Vsuch vapors have been condensed, and an outer reservoir containing the receiver and heating-tubes and adapted to contain a uid such as described.

2. A motive-power generator comprising a centrally-arranged closed receiver adapted to contain a iuid as described, tubes arranged around said receiver and adapted to be heated, an outer reservoir M containing the receiver and heating-tubes and adapted to contain a f'luid as described, a reservoir D communicating with the said outer reservoir M, a coil in reservoir D in communication with the steam-jacket of a driving-cylinder and with the reservoir M.

In testimony whereof we have hereto set our hands in the presence of the two subscribing witnesses.

ALFRED TI-IIEBLE. ALEXANDRE DUMEZ.

Vitnesses:

Louis SULLIGER, EDWARD P. MACLEAN. 

